Removing BF5 filter and placing on camera?

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poita
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Removing BF5 filter and placing on camera?

Post by poita » Sun May 13, 2012 12:31 am

The BF5 that comes with the PST is easily disassembled, leaving you with a 5mm square filter.
Would it be possible to sit this directly on a CCD like the the DMK21? Would this help with the restrictive field of view/hotspotting with the PST?
Also, would stacking the back-filters do anything to improve the image?

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Merlin66
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Re: Removing BF5 filter and placing on camera?

Post by Merlin66 » Sun May 13, 2012 5:53 am

Peter,
Anything's possible. It may help the FOV but I don't think it will affect the hot spot...
Where ever you place it make sure it's sitting square.
The bandwidth of the BF is already designed for the etalon finesse so there's no additional benefit in double stacking....
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Re: Removing BF5 filter and placing on camera?

Post by marktownley » Sun May 13, 2012 10:14 am

This is one of my plans Peter, will let you know how I get on...
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Re: Removing BF5 filter and placing on camera?

Post by scorpio » Mon May 14, 2012 9:30 pm

Sorry to ask this stupid question, but what do you mean by hot spot? I understand the FOV, but I don't know what is meant by hot spot.

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Re: Removing BF5 filter and placing on camera?

Post by poita » Wed May 23, 2012 12:30 am

Pretty much how it sounds, the image being bright in a 'spot' rather than even across the whole image.

This results in detail being better in one part of the image than another. On my PST a flare can completely fade from view depending on its location within the FOV.

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